| 摘要 |
FIELD: physics, optics.SUBSTANCE: invention relates to forming a digital imaginary image of the surface of a nano-object in a scanning tunnelling microscope. An imaginary image of a nano-object is its topography, which is different from the true topography, but retains distinctive features. A method of forming an imaginary image of the surface of a nano-object in a scanning tunnelling microscope includes scanning the surface of the analysed substance with a metal needle in direct current mode, for which, at each scanning point, the needle is moved vertically relative to the analysed surface such that tunnelling current at each scanning point is equal to the tunnelling current at the first scanning point. Data on the microstructure of the surface of the analysed substance are obtained by recording movement of the needle. A plane, which is parallel to the surface of the substrate, which is higher than the initial roughness of the substrate but lower than the transverse radius of the nano-object, is subtracted from the experimental topography of the surface with nano-objects on the substrate. The obtained image of the nano-object is scaled by multiplying with a coefficient greater than one.EFFECT: high selective resolution and efficiency of scanning tunnelling microscopy of nano-objects, for example, polymer molecules, enabling use of the method to determine the fragmentary sequence thereof.3 cl, 2 dwg |
